Retell AI alternatives

At a glance

We list 7 other voice tools as alternatives to Retell AI: AssemblyAI, Cartesia, Deepgram, ElevenLabs, Superwhisper, Vapi and Wispr Flow.
AssemblyAI, Cartesia, ElevenLabs, Superwhisper and Wispr Flow have a free plan.
AssemblyAI, Cartesia, Deepgram, ElevenLabs and Vapi work with Twilio, as Retell AI does.
AssemblyAI works with Zapier, as Retell AI does.

From each tool's own website and from published reviews. Each tool's page says when its facts were checked.

7 alternatives

Listed alphabetically. A tool is ranked by its reviews once it has 3.

AssemblyAI
Voice AI infrastructure for builders, with pre-recorded and real-time speech-to-text and voice agent APIs
No reviews yet
No checked fact sets it apart from Retell AI yet.
Free plan
Yes
Platforms
API
Integrations shared with Retell AI
Twilio, Zapier, Make, n8n
Main features
Pre-recorded Speech-to-Text API, Realtime Speech-to-Text API, Speech Understanding API
Security and compliance
SOC 2, SSO
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Cartesia
Voice agents that answer and make calls, and the speech models behind them, in one API
No reviews yet
No checked fact sets it apart from Retell AI yet.
Free plan
Yes
Paid plans from
Pro, $5 per month (as of October 20, 2026)
Platforms
API
Integrations shared with Retell AI
Twilio
Main features
Sonic text to speech, Ink speech to text, Managed Agents
Security and compliance
SOC 2, SSO
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Deepgram
Speech-to-text, text-to-speech and voice agent APIs for real-time, enterprise voice AI
No reviews yet
No checked fact sets it apart from Retell AI yet.
Plans
Pay as you go: $0.0043, Growth: $4K+ (as of October 19, 2026)
Platforms
API
Integrations shared with Retell AI
Twilio
Main features
Voice agent API, Speaker diarization, Cloud or self-hosted deployment
Security and compliance
SOC 2, GDPR, HIPAA
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ElevenLabs
Create lifelike speech with an AI voice generator and voice agents platform, in 90+ languages
No reviews yet
No checked fact sets it apart from Retell AI yet.
Free plan
Yes
Paid plans from
Pro, $99 per month (as of October 19, 2026)
Platforms
API
Integrations shared with Retell AI
Twilio
Main features
Text to speech, Speech to text, Voice cloning
Security and compliance
HIPAA, SSO
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Superwhisper
AI voice to text for macOS, Windows, iOS and Android. Dictate in any app, offline or in the cloud
No reviews yet
Choose it over Retell AI for: macOS, Windows, iOS or Android.
Free plan
Yes
Plans
Free: $0, Enterprise: Custom (as of October 19, 2026)
Platforms
macOS, Windows, iOS, Android
Integrations shared with Retell AI
None in common
Main features
Dictation in any app, Offline transcription, Custom modes
Security and compliance
SOC 2, HIPAA
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Vapi
Build, test and deploy voice AI agents. The platform for developers creating conversational voice AI
No reviews yet
No checked fact sets it apart from Retell AI yet.
Paid plans from
Core, $29 per month, plus usage (as of October 19, 2026)
Platforms
API
Integrations shared with Retell AI
Twilio
Main features
Testing and simulation, Call monitoring, Telephony and SIP
Security and compliance
SOC 2, HIPAA, SSO
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Wispr Flow
Voice-to-text AI that turns speech into clear, polished writing in every app
No reviews yet
Choose it over Retell AI for: macOS, Windows, iOS or Android.
Free plan
Yes
Plans
Free: $0, Enterprise: Custom (as of October 19, 2026)
Platforms
macOS, Windows, iOS, Android
Integrations shared with Retell AI
None in common
Main features
Personal dictionary, Snippets, AI meeting notetaker
Security and compliance
SOC 2, ISO 27001, HIPAA, SSO
Compare with Retell AI
Be the first to review